Moreover, DLAs appear to be linked to star-forming regions, as
evidenced by the metallicity evolution of DLAs with redshift
[1]}, [2]}, [3]}
and the velocity spread of low-ion absorption lines
[4]}. The average properties of
Ly\(\alpha \)  emission from DLAs, inferred from the stacking experiment of
hundreds of DLAs from the Sloan Digital Sky Survey (SDSS), further
indicate a connection between star formation activity and outflows
in DLA host galaxies [5]}, [6]}, [7]}.
Therefore, establishing a direct association of the H i gas seen in
absorption with emission from galaxies is a useful way to probe the
link between the H i gas and star formation at high redshift.
